Sennheiser has found a good balance between low and high range frequencies. ill deal with these until something drastic forces me to buy my other model. My only issue so far is that they are god awful ugly on my feet. Just got these bad boys and they did not disappoint! With the first step of assembly the rack had to be brought into alignment by pulling the pieces together. Used it every day for over 10 days. This Bluetooth speaker sounds great , it’s got a nice shape & color-I love it! warm and comfy. These flip flops are just old school 1950’s type. Dont let these mechanical terms distract you.